Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2015 Component Category RiskFactor Segment
Investment Securities [Abstract]
Number of components into which amount of impairment is split	2
Loans [Abstract]
Period after which loans are placed on non accrual status, minimum	90 days
Allowance for Loan Losses [Abstract]
Consecutive months of payments	6 months
Number of primary components of overall allowance for loan losses	3
Number of categories into which risk ratings are grouped | Category	5
Number of risk factors on agricultural loans | RiskFactor	2
Segment Reporting [Abstract]
Number of reportable segments | Segment	1
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Furniture and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years